Hot-water tank fitting



A. w. cARLsoN 2,475,007

no1' 'una um: rn'mm July s, 1949.

Fild Fab. 27, 194B INVENTOR. Arhurw Carlson f M ATrO'f'zNEY.

Patented July 5, 1949 Arthur W. Carlson, Kankakee,

A. 0. Smith Corporation, corporation of New York Ill., assigner to Milwaukee, Wis., a

t Application February 27, 194.8.Serial No. 11,669

Claims. a 1

This invention relates to a hot water tank tting to receive pipe connections, thermostatic elements and the like and particularly has referen-ce to a tting for a ceramic enamel lined hot water tank.

One object of the invention is to provide a fitend of ferrule 1 has thegenerally wide iiange' while the outer end comprises the iiange 3.

A gasket I0, which is of a resilient non-cor-A rosive material such as neoprene, `is assembled around projecting skirt v4 of spud 3 on the inside -of the tank. The flange 8 of vferrule .1 extends ting for a ceramic enamel lined hot water tank which is readily assembled therewith. f

Another object is to provide a tting fora ceramic enamel lined tank which seals off metal parts subject to corrosion against approach by the iiuid contained in the tank.

These and other objects of the invention will appear hereinafter in connection with the following description of the drawing illustrating several embodiments of the invention.

In the drawing:

Figure 1 is a sectional view through a tank wall and showing place;

Fig. 2 is an inside elevational view of the tting applied to the tank with parts broken away to show a portion of the washer in section; and

Fig. 3 is a view similar to Figure 1 of another embodiment of the invention.

The drawing shows a portion of the wall I of a hot water tank which is lined on the inside with ceramic enamel 2 to protect the metal of the tank wall from injury by corrosion by the contentsof the tank.

The'connection or tting employed with tank wall I comprises a metal bushing or spud 3 which is disposed within a suitable opening provided in wall I. The spud projects within the opening a slight distance to provide the cylindrical projecting skirt 4 inside the tank while the main portion of the spud extends outwardly lof the tank wall. a substantial distance.

The spud 3 is generallybf cylindrical shape and the portion projecting from the tank has threads 5 on the outside to receive pipe connections or other ttings and attachments.

That portion of spud 3 located in the tank opening is conical in shape on the outer surface and the edge of the opening is formed complementary thereto for tight engagement therewith when the spud is secured in the opening such as by the .electric resistance weld 6. y

Spud 3 is preferably made of carbon steel corresponding to the steel in the tank. However, it can be made of a non-corrosive alloy although that is not necessaryin view of the construction of the tting.

A cylindrical generally thin metal sleeve or ferrule 1 is disposed within spud 3. The inner the connection secured in over the end of skirt 4 and the gasket I0 and holds the gasket'tightly against enamel lining 2 l of wall I and the projecting skirt 4 of the spud to seal oi any` approach of fluid to the spud or thek edge of the tank opening.

The outer end iiange .9 of the ferrule is flanged against the outer end of spud 3 to seal the ferrule thereto and secure the ferrule in place. Where spud 3 is of carbon steel' the iiange 9 is joined to the spud at the outer end by solder II to insure that the spud will be fully protected. f Y I Ferrule 1 is non-corrosive and may beof a.'

non-corrosive stainless steel 'alloy or of copper or ordinary steel which is chrome plated or tinned to protect it. Ferrule 1 may be substantially thin because it functions mainly as a protector for the spud and therefore isfprovided at low cost. Fig. 3 illustrates another embodiment of the invention. In this embodiment threads 5 on the outside of spud 3 are eliminated and instead the spud is provided at the outer end with the cir cular flange I2. The outer flange 3 ofthel ferrule 1 extends over flange I2 and the fiangedconneo'- tion I3 is secured to spud 3 byy bolts I4 which extend through the same and circular flange I2 of'spud 3. With this construction the carbon spud is adequately protected from contact with corrosive fluid by the overlapping ferrule 1 which is securely clamped in place between spud ange I2 and connection I3.

Under one method of assembling a fitting such as that illustrated in Figs. 1 and 2. the spud 3 is i'lrst welded within the opening of tank wall I by weld 6. Thereafter the tank wall is lined with the ceramic enamel 2.V Gasket II) is next assembled over projecting skirt 4 of spud 3 and ferrule 1 is then disposed within the spud. The outer end of the ferrule is iianged against the outer end of spud 3 to form ange 9 and is joined to spud 3 byvsolder II. The inner end of the ferrule is formed over to `provide iiange 3 which extends over skirt 4 and engages gasket III. Flange 8 is formed into tight engagement with gasket I0 and forces the gasket tightly into the corner area between wall I` and skirt 4 to seal off the approach of iiuid to the tank opening. The outer anged end of ferrule 1 protects the outer end of the spud from contact with corrosive iiuid.

The invention provides a novel tank connection assembly which reduces costs and edectively seals on approach of the corrosive contained fluid from metal parts susceptible to attack by corrosion.

Various embodim'ents of the invention may be employed within the scope of the accompanying claims.

I claim:

1. A fitting assembly for a metal tank having a corrosion protective lining to protect the metal of the tank from corrosive attack by the contents thereof which comprises a metal spud welded within an opening in the wall of said tank and extending' on both sides of the tank wall, a resilient corrosion resistant gasket disposed around the inner projecting end of said spud. and a corrosion resistant ferrule assembled within said spud and sealed thereto and having a ilange on the inner end thereof extending over the inner end of the spud and forcing said gasket against the tank wall around the spud to seal off approach of the contents of the tank to the fitting opening.

2. A fitting connection for a hot water tank having a ceramic enamel lining to protect the metal of the tank from injury by corrosion from the contents thereof which comprises a metal spud welded within an opening in the wall of said tank and extending on both sides of the tank wall, a resilient corrosion resistant gasket disposed around the inner projecting end of said spud, and a corrosion resistant ferrule assembled within said spud with a flange on the outer end thereof sealed against the outer end of the spud and a flange on the inner end thereof extending over the inner end of the spud andengaglng said gasket to press the same tightly against the tank wall around said opening to seal oi! approach of the contents of the tank to the ntting opening.

3. A fitting connection for a hot water tankl having a ceramic enamel lining to protect the metal of the tank from injury by corrosion from the contents thereof,fwhich comprises ya metal spud electric resistance weldedwithin an opening in the wall of said tank and extending on both sides of the tank wall with the exterior portion being externally threaded to receive connections or other fittings. a vresilient corrosion resistant gasket assembled around the inner projecting end of said spud. and a corrosion resistant ferrule disposed within said spud with a ilange on the outer end extending over the outer end of the spud with solder joining the same thereto and a flange on the inner end thereof extending over the inner end of the spud and engaging said gasket to press the same tightly against the tank wall around said opening to seal of! approach of the contents of the tank to the fitting opening.

4. A fitting connection for a hot water tank having a ceramic enamel lining to protect the metal of the tank from injury by corrosion from the contents thereof, which comprises a metal spud electric resistance welded within an opening in the wall of said tank and extending on both sides of the tank wall with the outer end of the spud being flanged to receive a flanged tting. a resilient corrosion resistant gasket assembled around the inner projecting end of said spud. a corrosion resistant ferrule disposed within said spud with a flange on the inner end thereof extending over the inner end of the spud and engaging said gasket to press the same tightly against the tank wall around said opening to seal oi! approach of the contents of the tank to the fitting opening, and 'a flange on the outer end of said ferrule formed complementary 'w the iiange on said spud to be interposed between the spud and the flanged fitting secured to the spud to seal the ferrule in place.

5. A fitting assembly for a metal tank having a corrosion protective lining to protect the metal of the tank from corrosive attack by the contents thereof which comprises a metal spud welded within an opening in the wall of said tank, a resilient corrosion resistant gasket disposed at the inner end of said spud, and a cor- D rosion resistant ferrule assembled within said spud and sealed thereto and having a flange on the inner end thereof extending over the inner end of the spud and forcing said gasket against the tank wall around the spud to seal oif ap- 45 proach of the contents of the tank to the iitting Opening.

ARTHUR W. CARLSON.

No references cited. 

